https://www.postgresql.org/docs/9.4/datatype-json.html JSON data types are for storing JSON (JavaScript Object Notation) data, as specified in RFC 7159. Such data can also be stored as text, but the JSON data types have the advantage of enforcing that each stored value is valid according to the JSON rules. There are also assorted JSON-specific functions and operators available…
Category: Python
Flask and Apache Solr 7.5 using HTML input for searching
This post follows up the first one Flask and Apache Solr 7.5. Now we are going to several user inputs for returning values in from Solr. The code is at github: https://github.com/spawnmarvel/solrhttp A quick follow up on what we have: Flask is and Solr is running on localhost. The template Search.html has a input field…
Flask and Apache Solr 7.5
Lets develop a webapp with Solr. Short guide to Jinja2: http://jinja.pocoo.org/docs/2.10/ Jinja2 is a modern day templating language for Python developers. It was made after Django’s template. It is used to create HTML, XML or other markup formats that are returned to the user via an HTTP request. Sandboxed Execution: It provides a protected framework…
Python multicasting UDP wireshark
https://www.wireshark.org/ A multicast address is a logical identifier for a group of hosts in a computer network that are available to process datagrams or frames intended to be multicast for a designated network service. Multicast addressing can be used in the link layer (layer 2 in the OSI model), such as Ethernet multicast, and at…
Python network client and server using socket
So today I bought the course from udemy: Mastering Python – Networking and Security. The first lessons is about Python 2 vs 3, standard Python, console, running scripts, variables, loops, scoping, subroutines, system calls etc, a new refresh with code and videos. Moving on….. Networking section 3: 22: Network byte order: Endian describes how the…
Apache Solr 7.5 The Standard Query Parser focus searching
http://lucene.apache.org/solr/guide/7_5/the-standard-query-parser.html Solr’s default Query Parser is also known as the “lucene” parser. The key advantage of the standard query parser is that it supports a robust and fairly intuitive syntax allowing you to create a variety of structured queries. The largest disadvantage is that it’s very intolerant of syntax errors, as compared with something like…
Apache Solr 7.5 Index build with DirectUpdateHandler2 HTTP
http://lucene.apache.org/solr/guide/7_5/uploading-data-with-index-handlers.html Index Handlers are Request Handlers designed to add, delete and update documents to the index. In addition to having plugins for importing rich documents using Tika or from structured data sources using the Data Import Handler, Solr natively supports indexing structured documents in XML, CSV and JSON. The default in solrconfig.xml is an…
Apache Solr 7.5 create core, alter schema and query for API data
With reference to previous tutorial: Core A single Solr instance, which represents a single Solr index. A core has a different set of configuration files and schema definitions than other cores. Now lets create a new core, after downloading and installing the files, have a look at the readme file in solr-7.5.0 directory (my pc;…
OpenOPC Python
OpenOPC for Python http://openopc.sourceforge.net/ OpenOPC for Python is a free, open source OPC (OLE for Process Control) toolkit designed for use with the popular Python programming language. Because the OpenOPC library implements a minimal number of Python functions which may be chained together in a variety of ways, the library is simple to learn and…
Zabbix 3.4 trigger functions with Python
So you have all your data, all is sent to Zabbix. What now…… Zabbix configuration for trigger: https://www.zabbix.com/documentation/3.4/manual/config/triggers Zabbix supported trigger functions: https://www.zabbix.com/documentation/3.4/manual/appendix/triggers/functions Item type of information: Numeric (unsigned) – 64bit unsigned integer Numeric (float) – floating point number Negative values can be stored. Allowed range: -999999999999.9999 to 999999999999.9999. Starting with Zabbix 2.2, receiving…